Tropical Cyclone Shaheen slammed Oman on Sunday with winds and heavy rain, flooding streets, prompting evacuations from coastal areas and delaying flights to and from the capital, Muscat.

When its eye crossed land, the cyclone was carrying winds of between 75-93 mph, Omani authorities said. It was also creating waves of up to 10 metres.

Massive rainfall of as much as 20 inches was expected in some areas, potentially causing flash floods.

However, Shaheen was downgraded to a tropical storm after it had hit land, the local meteorology service said.

As the cyclone approached, several people were reported dead, including two workers were killed when a hill collapsed on their housing area in an industrial zone, the state news agency reported.

Video footage from local broadcasters showed vehicles submerged as people tried to make their way through muddy brown floodwater.

Part of the eyewall of the storm had entered Al Batinah South governorate, the state news agency said. The eye also entered between the states of Musanah and Suwaiq.

The national emergency committee said the power supply would be cut in al-Qurm, east of the capital, to avoid accidents. More than 2,700 people were put up in emergency shelters.

Most of the oil-exporting country’s five million people live in and around Muscat. Authorities said roads in the capital would be open only to vehicles on emergency and humanitarian journeys until the storm dies down.

In the United Arab Emirates, authorities said precautionary measures were being taken. Police officials were moving to ensure safety by conducting security patrols near beaches and valleys where torrential rains were expected.

Government and private sector employees in the city of Al Ain on the border with Oman have been urged to work remotely on Monday and authorities called on residents to avoid leaving home except for emergencies, the Abu Dhabi Government Media Office said.

“Authorities are working proactively around the clock to evaluate residential units in expected affected areas and transport families to safe locations until it is safe to return,” it said.

Saudi Arabia’s civil defence authorities called for caution in several regions from Monday to Friday in expectation of high winds and possible flooding, the state news agency reported.

Follow us on twitter: @risksEmerging